KHARTOUM - Sudanese protest leaders on Wednesday threatened to launch a nationwide campaign of civil disobedience after accusing the country's military rulers of delaying the transfer of power to a civilian administration.

Thousands of people remain camped outside the military headquarters in Khartoum nearly four weeks after the armed forces toppled autocratic president Omar al-Bashir as demanded by a months-long protest movement.

The two sides are grappling over whether an overall ruling council that would replace the existing army council -- made up solely of generals -- should have a civilian or military majority.

Last week the Alliance for Freedom and Change protest group handed over its proposals for a civilian structure, including executive and legislative bodies, that it eventually wants to rule Sudan after replacing the generals.

The 10-member military council late on Tuesday said it agreed to the overall proposals, but had "many reservations".

The protest leaders said on Wednesday that the military council was delaying the entire transfer of power.

"The military council's response to the proposals of the Alliance for Freedom and Change was disappointing and risked putting the country in jeopardy," protest leader Khalid Omar Yousef told reporters.

Responding to a journalist's question on what steps demonstrators would take after the army expressed reservations, Yousef threatened "escalatory measures".

"The measures of escalation for us are defined -- they are continuing with the sit-in, and we are now preparing for a civil disobedience" campaign across the country, he said.

'Kidnap the revolution'

The alliance also expressed concerns about the military dragging the process out.

"The military council's response... is moving in the direction of extending the negotiations and not in the direction of a transition" of power, it said in a statement.

On Tuesday the military council said the alliance had remained silent on its proposals on ensuring that Islamic sharia remains the bedrock of Sudanese legislation.

The protest leaders said the generals "raised irrelevant issues including the language and sources of legislation in a tedious repetition of the biddings of the former regime".

"We call on the military council to reach an agreement to transfer power," they said in the statement.

The Alliance for Freedom and Change is made up of political groups, leaders and activists, several of them who want to build a new secular Sudan.

Sudanese media and websites have often reported that for the protest leaders the issue of legislation and Islamic law is something that can be discussed later, but they first want a civilian body established in order to govern the country.

The protest movement said the miliary council is acting in a way that seems to "kidnap the revolution and control its outcome".

"The only choice for our people is comprehensive peaceful resistance until the revolution's demands are achieved."

Election in six months

The military council said Tuesday that if the deadlock with protest leaders is not broken then it has the option of calling for elections in six months.

"It's an attempt to legitimise the regime," protest leader Madani Abbas Madani told reporters, indicating that such an election could see the return of previous regime figures.

Protest leaders have often called the military rulers the "remnants of the regime" of Bashir.

Thousands of protesters have been encamped outside the sprawling military headquarters in central Khartoum since April 6.

Initially they gathered there to seek the army's support in ousting Bashir.

But now they continue to hold their sit-in against the military council, demanding that it step down and transfer power to a civilian authority.

The council and protest leaders have differed on several issues and not just the composition of an overall ruling council.

The military council wanted a two-year transition period as opposed to four years proposed by protest leaders.

The council was also of the opinion that declarations of emergencies should be in the hands of a "sovereign" authority rather than the cabinet as sought by protest leaders.

Protest leaders however insist their key demand remains the same -- a full transfer of power to civilians.

"The solution and success of the revolution lies on transfer of power to a full civilian authority," protest leader Mohamed Naji al-Assam said on Tuesday.